Sash-pulley.



C. B. FOOTE, JR.

SASH PULLEY.

APPLICATION FILED NOV. I7. 1915.

Patented Nov. 14, 1916.

fm/emor- A ffo/wgy. v

CHARLES B. FOOTE, J'Ri, OF CINCINNATI, OHIO, ASSIGNOR OF'ONE HALF TO WALTER MACLEOD, OF CINCINNATI, OHIO.

SASI-I-PULLEY.

Specification of Letters Patent. Yatgyflggd N 14, 1916 Application filed November 17 1915. Serial No. 62,034.

ley which may be secured in position in its mounting frame without the use of screws or tools.

A further object is to produce a sash pul ley, the fastening means of which can not be torn from the sash frame.

A further object is to produce a sash pulley in which a minimum amount of grouting of the sash frame is necessary in order to mount the pulley therein.

These and other objects are attained in Y the sash pulley described in the following specification and illustrated in the accompanying drawing in which;

Figure 1 is a sectional elevation of a sash pulley embodying my invention, mounted in a sash frame. Fig. 2 is a view similar to Fig. 1 but showing a modified form of pulley embodying my invention.

In sash pulleys of ordinary construction, fastening screws are usually employed for securing the pulley to the sash frame. Since sash pulleys are subjected to a great strain, their fastening means of necessity have to be such as to render the pulley very secure and of such a construction as to prevent the pulley being pulled from the sash frame during the passage of the sash cord over it. The objection to sash pulleys of ordinary construction is that their fastening screws do not afford sufficient grip to prevent their being pulled from the wood into which they are driven. This frequently occurs, particularly when the window and its counterbalancing weight are unusually heavy and are opened or closed violently. Such a sudden opening or closing of a window causes the fastening means of the pulley to be subjected to a great strain. This pulling of the pulley and its fastening means from the sash frame causes the cord to drop on to the edge of the pulley socket in the frame and results in breaking the cord, thus rendering it diflicult to open or close the window. 7

In my improved sash pulley construction I have entirely eliminated the usual fastening means and have constructed a pulley which may be secured in a position in the sash frame bythe mere operation of pushlng it into position. This pulley consists of a sheave 3 rotatively mounted on a pin 4: extending transversely of a housing which embraces the sheaf. The housing consists of side plates 6, top and bottom plates 7 and 8 to which the side plates 6 are secured, and a face plate 9 preferably formed integrally with the top and bottom plates 7 and 8; In the top plate 7 is reciprocally mounted a pin 10, the operation of which is controlled by a spring 11 secured by a rivet 12 located in the top plate, and

normally tending to force the pin 10 up-v wardly so that its upper end extends materially beyond the top plate 7. A similar construction is employed at the bottom of the pulley, consisting of a pin 13 reciprocally mounted in an aperture in the bot tom plate 8, and controlled by a spring 14. secured by a rivet 15, and normally tending to force the end of the pin 13 through the bottom plate 8. Both of the pins 10 and 13 are provided with beveled end faces 16 and 17 inclined toward the back of the pulley with the longer edge of the pins contacting the back surface of the strip 18 forming the pulley mounting strip of the sash frame. These pins and springs form latches for securing the pulley in position. The strip 18 is provided with a socket into which the pulley is forced, which consists of an opening into which the housing is forced, and short grouted out portions above and below the housing opening which are occupied by the ends of the front plate'9.

My pulley is constructed with short end extensions on the plate 9 since the elimination of fastening screws renders it unnecessary to have the ends of the plate extend beyond an amount sufficient to properly retain the pulley in its mounting socket. This greatly reduces the amount of grouting necessary to receive the ends of the front plate and renders the pulley more easily positioned than pulleys of ordinary construction.

In driving the pulley into position the pins 10 and 13 are pressed inwardly toward one another until their beveled ends engage the top and bottom faces of the socket. As the pulley is driven into the socket the pins are held inwardly against top and bottom faces of the socket by the tension of the springs 11 and 14:, until their edges have been freed by passing beyond the socket, thus permitting them to be forced outwardly by their mounting springs and to be projected against the rear walls of the strip 18. lhis retains the pulley in its mounting socket and prevents its displacement therefrom.

In Fig. 2 a modified form of my invention is illustrated in which the bottom plate 8 is inclined from the horizontal in such a position as to present a surface downwardly inclined toward the rear face of the strip 18; The socket in the strip is so formed as to present an apex 18 to fit'within the angle formed by the bottom plate S and the front plate 9 of the pulley housing. The top plate 7 of the pulley is also inclined downwardly toward the rear face of the strip 18, but not to as great an extent as the bottom plate 8. From the bottom plate the spring and pin are eliminated, and in the top plate the spring and pin are retained. In this modified form the operation of placing the pulley in position in the sash frame consists in bringingthe lower portion of the pulley into position first, with thebottom plate 8 engaging the inclined face of the portion 18 of the strip 18. With the lower portion of the pulley thus positioned the upper portion is pushed into the socket, the pin 10" being pushed inwardly so that its beveled end will clear the front edge of the top of the socket. l/Vhen the pulley has been completely driven into the socket, the spring 11 will force the pin l0 against the rear face of the strip 18 and lock the pulley in position. e

daving thus described my invention, what I claim is:

1. A sash pulley comprising a sheave, a housing for the sheave, and means permanently mounted inthe housing and having reciprocal movement therein adapted to move into locking engagement with the sash frame when the pulley is positioned therein, whereby the housing will be instantly locked within the sash frame upon coming to position therein.

2. In combination in a sash pulley, a sheave, a housing for the sheave, and a spring latch permanently mounted on the.

casing, and adapted to move into locking engagement with the sash frame when the pulley is positioned therein.

3. A, sash pulley comprising a sheave, a housing for the sheave, means reciprocally mounted in the housing and adapted to be moved into locking engagement with the sash frame when the pulley is positioned therein, and a spring mounted on the housing, operatively connected with the means, and adapted to normally urge the means to lock the housing in its mounting frame.

' 41. In combination in a sash pulley, a sheave, a housing for the sheave, a pin reciprocally mounted in the housing and adapted to be moved into locking engagement with the sash frame when the pulley is positioned therein, and a spring mounted on the casing, operatively connected with the pin, and adapted to normally urge the pin to lock the housing in its mounting frame.

In testimony whereof, I have hereunto subscribed my name this 8th day of November, 1915.

CHARLES B. FOOTE, JR.

Witnesses:

WALTER F. MURRAY, W. THORNTON BOGERT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

